How to define the ray tracing coordinate (Hx,Hy,Px,Py)?

  • 19 January 2023
  • 1 reply

Userlevel 2

Hi Zemax Community,

Can you help me with this?  I have read the passage


and want to confirm that my understanding is right. 

Things want to do

To trace the specified field & wavelength light ray location on the image surface.
   here are wave1 and wave2 at field1 (my model is a spectrometer)
I use REAY in merit function and set the wave1 and wave2 coordinate as below

 but I am not sure whether it is right , could you please help me see it ?








Best answer by Sandrine Auriol 26 January 2023, 14:32

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1 reply

Userlevel 6
Badge +2

Hi @Yang.Yongtao 

Open the field data editor and define your fields there:

Hx, Hy are normalized definitions.

So when x=0.5 in the object plane → Hx=1

When y=0.5 in the object plane → Hy=1


You can then check this with the Single Ray Trace: